A332582 - cp's OEIS frontend

A332582 Label the cells of the infinite 2D square lattice with the square spiral (or Ulam spiral), starting with 1 at the center; sequence lists primes that are visible from square 1.

n	a(n)
1	2
2	3
3	5
4	7
5	29
6	41
7	47
8	83
9	89
10	97
11	103
12	107
13	109
14	113
15	173
16	179
17	181
18	191
19	193
20	199
21	223
22	293
23	311
24	317
25	347
26	353
27	359
28	443
29	449
30	457
31	461
32	467
33	479
34	487
35	491
36	499
37	503
38	509
39	521
40	523
41	631
42	641
43	643
44	647
45	653
46	659
47	661
48	673
49	683
50	691
51	701
52	709
53	719
54	727
55	857
56	863
57	887
58	929
59	947
60	953
61	1091

[2, 3, 5, 7, 29, 41, 47, 83, 89, 97, 103, 107, 109, 113, 173, 179, 181, 191, 193, 199, 223, 293, 311, 317, 347, 353, 359, 443, 449, 457, 461, 467, 479, 487, 491, 499, 503, 509, 521, 523, 631, 641, 643, 647, 653, 659, 661, 673, 683, 691, 701, 709, 719, 727, 857, 863, 887, 929, 947, 953, 1091]

cp's OEIS Frontend

A332582 Label the cells of the infinite 2D square lattice with the square spiral (or Ulam spiral), starting with 1 at the center; sequence lists primes that are visible from square 1.

Table of values

List of values